Fast FLAIR sequence structure. Typical FSE sequence structure of multiple 180° pulses is modified by addition of a 180° inversion pulse, followed by a delay time until the alpha pulse (inversion time or TI). CSF is suppressed by appropriate selection of inversion time, which for FLAIR is approximately 2000 ms. Effective TE is determined by low-amplitude phase-encoding steps (central k-space). S = slice-select direction, R = “read” or frequency-encode direction, P = phase-encode direction
Fast FLAIR sequence structure
Fast FLAIR sequence structure. Typical FSE sequence structure of multiple 180° pulses is modified by addition of a 180° inversion pulse, followed by a delay time until the alpha pulse (inversion time or TI). CSF is suppressed by appropriate selection of inversion time, which for FLAIR is approximately 2000 ms. Effective TE is determined by low-amplitude phase-encoding steps (central k-space). S = slice-select direction, R = “read” or frequency-encode direction, P = phase-encode direction
Subscribe to:
Post Comments (Atom)
Popular Posts
-
Axial Plane: Prescribe plane perpendicular to midshaft of the proximal phalanx of the thumb. Scan from 1st carp-metacarpal joint th...
-
Prostrate MRI Appearence T1‐weighted MR images, the normal prostate gland demonstrates homogeneous intermediate to‐ low signal inten...
-
Normal MRI Anatomy The pectoralis tendon is best seen on axial T1 and T2-weighted images as a curvilinear low-signal band inserting o...
-
The sternum and sternoclavicular joints are difficult to evaluate with plain radiographs. The value of CT in assessing lesions of the...
-
MRI of the six labral zones of the glenoid labrum Fat suppressed oblique sagittal T1 weighted MR arthrogram image, demonstrating t...
-
Intended to provide a detailed examination of the seventh and eight cranial nerves and the other C-P angle structures, especially for detec...
-
The " Skull Base MRI Protocol" is almost identical to the IAC/Temporal bone Protocols Without Contrast " Skull Base MRI Se...
No comments:
Post a Comment